Fountain pen



Sept. 9. 1924.

A- O. DAHLBERG FOUNTAIN PEN Original Filed Sept. 5, 1922 INVENTOH sin o B' M g TTRNEYS- l Patented Sept. 9, 1924i.

UNITED?l STATES l asoma PAATEFNT'VQFFICE.

ARTHUR onAUS DAHL'BERG, or MADISON, WISCONSIN.

FOUNTAIN lInN.

Application led September 5, 1922, Serial No. 586,279;V RenewedJuly 16,1924.

To all whomit may concern:

Be it known that I, ARTHUR OLAUS DAHLBERG, a citizen of the United States, and a resident of Madison, in thecounty of Dane and State of "Wisconsin, have invented anew and useful Improvement in Fountain Pens, of which the following is a full, clear,

obliged, however, to keep a close watch asthe ink lrises in thebarrel, because continued pumping,`when the 'barrel is filled with ink, would cause the ink to overiiow.

` The construction ofthe present device is designed primarily to obviate the disadvantage of having the ink overflow when the barrel is full. To this end I provide automatic means which prevents the overflowingof the ink out of the pumping end of the pen when the pen is filled with ink.

A further object of my invention is'tol provide a device of the type described which is simple in construction, durable and eticient for the purpose intended, and which is not likely to easily get out of order.

Other objects and vadvantages will `appear in the following specication, andthe novel features of the invention will be particu-` larly pointed out in the appended claims.

lMy invention is illustrated in the accompanying drawings forming part of this application, in which- Figure 1 is a vertical section through the pen, and

Figure 2 is a vertical Section of a modified form of the device.

In carrying out my invention, I provide a barrel v1, having a sleeve 2 in which a member 3 is fixed and provided with a canal 4 for feeding ink contained in the barrel 1 to a pen 5. The opposite end of the barrel 1 is reduced and is provided with an exteriorly threaded neck 6.

A novel ink pumping means and check l valve is disposed in the barrel and is adapted to be manually actuated to suck ink into the barrel, and,vfurthermore, toiprevent theink from passing through the neck 6 when' the lbarrelv` has Ybeen `filled with ink. Y This kmeans comprises a piston 7 which is slidably disposed in the barrel 1, and which is adapted to be actuated by a plunger rod 8. The

lower end of the rod 8 is fashioned into a valve 9 which is disposed in a recess 10 of the piston 7. A rubber collar .11 frictionally engages with the wall of they recess 10 and closes the outer end of the recess. The collar 11 is immovably held inthe piston 7 and forms a part thereof. The Vcollarpermits movement of thevalve 9 'with respect thereto, the valve "being vadapted to open and closethe opening 12in the collar.

The piston 7 is shown inlowered position in Figure 1, and the spring 13 is shown compressed. The spring 13 I'bears on Athe neck 6 and on the head` 14 `of the rodl 8, and is adapted to move the piston 7 upwardly and to seatvthe vaive'9f'I`he rod 8 hasv integral lugs 15 which engage withthe collar 11 to movel the piston downwardly.

' A check valve 16 isdisposed in a recess 17 of the piston 7 and Vprovides an automatic means for. closing the opening 18, which communicates with the recesses 10 and 17,r

when the'barrel l has been filled with ink.

The valve 16, which is in 'reality a float, is

retained within the recess 17 by means of a wire19 that is secured to the piston 7.

From the foregoing descriptionl yof the various parts of the'device, the operation .thereof 'may be readily understood. In filling the pen with ink, the cap 2 0 is removed from the'r neck 6, and the pen inserted vintoan ink reservoir. rIhe linger of the operator nowA presses upon the head 14 so as tomove the rod 8 and piston 7 into the positions shown in Figure 1. vThe spring 13 is compressed when vthe rod 8 is moved downwardly and tends to move thel rod 8 back into normal position. The rod 8 in moving downwardly unseats the valve 9 and Y moves the pist-on 7 by means of the lugs 15.

The air in the barrel 1 passes through the opening 21 in the check float 16, the opening 18, the opening 12, and out through the neck 6. The opening 18 is not closed by the float 16 because the ink is not of suiiif v cient height within the barrel to move the iioat into closed position. The float is .carried by the wire 19. When the -rod 8 is released, the spring 13 moves it back into normal position. Theupward ymovement of the inlr would be pumped into the barrel so as to overflow from the neck 6. The check float valve in the present device is designed to obviate this disadvantage. When the barrel is filledvwith ink, the float 16 is raised so as to close the opening' 1.8. A downward movement of the plunger will not force the ink through the opening 18 and the neck 6, since the opening isclosed. The inl; will be driven out through the pen point 5. Furthermore it requires greater pressure to force the ink through the duct -1 when the float 16 has closed the opening 1S than it does to pump the inlr into the barrel when the opening 18 is opened to permit the passage of the air. This, therefore, provides a ready means by which the operator knows `when the pen is lled. The valve 9 is normally seated and prevents the ink from leaking out through the` neck 6 when the pen is in use.

In Figure 2 I have shown a slightly modified form of the device. This device is identical to the device heretofore described eX- cept that the rod 30 is permanently secured to the piston'31. Adisc 32 isfslidably mounted in the barrel 1 and is adapted to close the openings 33 in the piston. The openings merge into a common opening 341 which is adapted' to be closed by the` checlr valve 35. The other parts of the device are identical to the partsv of the pre.- ferred form and thereforeJ need no further i description.

The operation of the modied form of the device is substantially the sameas the preferred form. The piston 31 is moved away from the Ydise 39- when the head 14 is moved downwardly. This operation uncovers the openings 33 in the same manner as the opening 12 is uncovered. An upward movement vacuum is created to draw the ink into the barrel.

The pen is simple in construction, and provides a novel means for pumping "ink into the barrel, and for preventing the overflow of ink out of the barrel.

I claim:

1. A fountain pen comprising a barrel, a piston slidably disposed within the barrel and having a passage-way for air therethrough, .a valve for normally closing one portion of said passage-way, means for simultaneously moving said piston toward the pen and for opening said valve, spring means for moving said piston away from said pen and for simultaneously closing said valve, whereby ink is drawn into the barrel,

and a floaty for closing another portion of said passage-way when the ink in the barre-l reaches a predetermined height.

2. The combination with the barrel of a fountain pen having an air inlet at one end, of a piston slidably disposed in said barrel, and having an air passage-way therethrough, a valve for normallyelosing one endl of said passage-way, a rod for opening the valve,

piston to move the latter, spring means for retracting the rod, a float carried by the piston and adapted to close said passage-way when the ink in the barrel has reached a predetermined height. 3. A fountain pen comprising a barrel, a piston therein, said piston having an opening therethrough when moved inwardly, and

a check valve operated by theliquid within the barrel for closing the opening when the liquid has vreached a predetermined level.

11. A fountain pen comprising a barrel having an open end, a piston disposed in said f ARTHUR oLAUs Drunense. i

-means carried by the( rod for engaging the 

